xref: /freebsd/lib/libutil/tests/humanize_number_test.c (revision 5aa45fcb67c077ac3bd7627d49499b3234c01e7c)

/*-
 * Copyright 2012 Clifton Royston
 * Copyright 2013 John-Mark Gurney
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * $FreeBSD$
 *
 */

#include <sys/param.h>
#include <inttypes.h>
#include <libutil.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>

#define	MAX_STR_FLAGS_RESULT	80
#define MAX_INT_STR_DIGITS	12

static const int64_t halfExabyte = (int64_t)500*1000*1000*1000*1000*1000L;

static struct {
	int retval;
	const char *res;
	int64_t num;
	int flags;
	int scale;
} test_args[] = {
	/* tests 0-13 test 1000 suffixes */
	{ 2, "0 ", (int64_t)0L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 k", (int64_t)500L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)500*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 G", (int64_t)500*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 T", (int64_t)500*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 P", (int64_t)500*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 E", (int64_t)500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 2, "1 ", (int64_t)1L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 k", (int64_t)1500L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 M", (int64_t)1500*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 G", (int64_t)1500*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 T", (int64_t)1500*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 P", (int64_t)1500*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 E", (int64_t)1500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },

	/* tests 14-27 test 1024 suffixes */
	{ 2, "0 ", (int64_t)0L, 0, HN_AUTOSCALE },
	{ 3, "1 K", (int64_t)512L, 0, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)512*1024L, 0, HN_AUTOSCALE },
	{ 3, "1 G", (int64_t)512*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "1 T", (int64_t)512*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "1 P", (int64_t)512*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "1 E", (int64_t)512*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 2, "1 ", (int64_t)1L, 0, HN_AUTOSCALE },
	{ 3, "2 K", (int64_t)1536L, 0, HN_AUTOSCALE },
	{ 3, "2 M", (int64_t)1536*1024L, 0, HN_AUTOSCALE },
	{ 3, "2 G", (int64_t)1536*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "2 T", (int64_t)1536*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "2 P", (int64_t)1536*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 3, "2 E", (int64_t)1536*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },

	/* tests 28-37 test rounding */
	{ 3, "0 M", (int64_t)500*1000L-1, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)500*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)1000*1000L + 500*1000L-1, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "2 M", (int64_t)1000*1000L + 500*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 3, "0 K", (int64_t)512L-1, 0, HN_AUTOSCALE },
	{ 3, "1 K", (int64_t)512L, 0, HN_AUTOSCALE },
	{ 3, "0 M", (int64_t)512*1024L-1, 0, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)512*1024L, 0, HN_AUTOSCALE },
	{ 3, "1 M", (int64_t)1024*1024L + 512*1024L-1, 0, HN_AUTOSCALE },
	{ 3, "2 M", (int64_t)1024*1024L + 512*1024L, 0, HN_AUTOSCALE },

	/* tests 38-61 test specific scale factors with 1000 divisor */
	{ 3, "0 k", (int64_t)0L, HN_DIVISOR_1000, 1 },
	{ 3, "1 k", (int64_t)500L, HN_DIVISOR_1000, 1 },
	{ 3, "0 M", (int64_t)500L, HN_DIVISOR_1000, 2 },
	{ 3, "1 M", (int64_t)500*1000L, HN_DIVISOR_1000, 2 },
	{ 3, "0 G", (int64_t)500*1000L, HN_DIVISOR_1000, 3 },
	{ 3, "1 G", (int64_t)500*1000*1000L, HN_DIVISOR_1000, 3 },
	{ 3, "0 T", (int64_t)500*1000*1000L, HN_DIVISOR_1000, 4 },
	{ 3, "1 T", (int64_t)500*1000*1000*1000L, HN_DIVISOR_1000, 4 },
	{ 3, "0 P", (int64_t)500*1000*1000*1000L, HN_DIVISOR_1000, 5 },
	{ 3, "1 P", (int64_t)500*1000*1000*1000*1000L, HN_DIVISOR_1000, 5 },
	{ 3, "0 E", (int64_t)500*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 3, "1 E", (int64_t)500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 3, "0 k", (int64_t)1L, HN_DIVISOR_1000, 1 },
	{ 3, "2 k", (int64_t)1500L, HN_DIVISOR_1000, 1 },
	{ 3, "0 M", (int64_t)1500L, HN_DIVISOR_1000, 2 },
	{ 3, "2 M", (int64_t)1500*1000L, HN_DIVISOR_1000, 2 },
	{ 3, "0 G", (int64_t)1500*1000L, HN_DIVISOR_1000, 3 },
	{ 3, "2 G", (int64_t)1500*1000*1000L, HN_DIVISOR_1000, 3 },
	{ 3, "0 T", (int64_t)1500*1000*1000L, HN_DIVISOR_1000, 4 },
	{ 3, "2 T", (int64_t)1500*1000*1000*1000L, HN_DIVISOR_1000, 4 },
	{ 3, "0 P", (int64_t)1500*1000*1000*1000L, HN_DIVISOR_1000, 5 },
	{ 3, "2 P", (int64_t)1500*1000*1000*1000*1000L, HN_DIVISOR_1000, 5 },
	{ 3, "0 E", (int64_t)1500*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 3, "2 E", (int64_t)1500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },

	/* tests 62-85 test specific scale factors with 1024 divisor */
	{ 3, "0 K", (int64_t)0L, 0, 1 },
	{ 3, "1 K", (int64_t)512L, 0, 1 },
	{ 3, "0 M", (int64_t)512L, 0, 2 },
	{ 3, "1 M", (int64_t)512*1024L, 0, 2 },
	{ 3, "0 G", (int64_t)512*1024L, 0, 3 },
	{ 3, "1 G", (int64_t)512*1024*1024L, 0, 3 },
	{ 3, "0 T", (int64_t)512*1024*1024L, 0, 4 },
	{ 3, "1 T", (int64_t)512*1024*1024*1024L, 0, 4 },
	{ 3, "0 P", (int64_t)512*1024*1024*1024L, 0, 5 },
	{ 3, "1 P", (int64_t)512*1024*1024*1024*1024L, 0, 5 },
	{ 3, "0 E", (int64_t)512*1024*1024*1024*1024L, 0, 6 },
	{ 3, "1 E", (int64_t)512*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 K", (int64_t)1L, 0, 1 },
	{ 3, "2 K", (int64_t)1536L, 0, 1 },
	{ 3, "0 M", (int64_t)1536L, 0, 2 },
	{ 3, "2 M", (int64_t)1536*1024L, 0, 2 },
	{ 3, "0 G", (int64_t)1536*1024L, 0, 3 },
	{ 3, "2 G", (int64_t)1536*1024*1024L, 0, 3 },
	{ 3, "0 T", (int64_t)1536*1024*1024L, 0, 4 },
	{ 3, "2 T", (int64_t)1536*1024*1024*1024L, 0, 4 },
	{ 3, "0 P", (int64_t)1536*1024*1024*1024L, 0, 5 },
	{ 3, "2 P", (int64_t)1536*1024*1024*1024*1024L, 0, 5 },
	{ 3, "0 E", (int64_t)1536*1024*1024*1024*1024L, 0, 6 },
	{ 3, "2 E", (int64_t)1536*1024*1024*1024*1024*1024L, 0, 6 },

	/* tests 86-99 test invalid specific scale values of < 0 or >= 7 with
	and without HN_DIVISOR_1000 set */
	/*  all should return errors with new code; with old, the latter 3
	are instead processed as if having AUTOSCALE and/or GETSCALE set */
	{ -1, "", (int64_t)1L, 0, 7 },
	{ -1, "", (int64_t)1L, HN_DIVISOR_1000, 7 },
	{ -1, "", (int64_t)1L, 0, 1000 },
	{ -1, "", (int64_t)1L, HN_DIVISOR_1000, 1000 },
	{ -1, "", (int64_t)0L, 0, 1000*1000 },
	{ -1, "", (int64_t)0L, HN_DIVISOR_1000, 1000*1000 },
	{ -1, "", (int64_t)0L, 0, INT_MAX },
	{ -1, "", (int64_t)0L, HN_DIVISOR_1000, INT_MAX },

	/* Negative scale values are not handled well
	 by the existing library routine - should report as error */
	/*  all should return errors with new code, fail assertion with old */

	{ -1, "", (int64_t)1L, 0, -1 },
	{ -1, "", (int64_t)1L, HN_DIVISOR_1000, -1 },
	{ -1, "", (int64_t)1L, 0, -1000 },
	{ -1, "", (int64_t)1L, HN_DIVISOR_1000, -1000 },

	/* __INT_MIN doesn't print properly, skipped. */

	{ -1, "", (int64_t)1L, 0, -__INT_MAX },
	{ -1, "", (int64_t)1L, HN_DIVISOR_1000, -__INT_MAX },


	/* tests for scale == 0, without autoscale */
	/* tests 100-114 test scale 0 with 1000 divisor - print first N digits */
	{ 2, "0 ", (int64_t)0L, HN_DIVISOR_1000, 0 },
	{ 2, "1 ", (int64_t)1L, HN_DIVISOR_1000, 0 },
	{ 3, "10 ", (int64_t)10L, HN_DIVISOR_1000, 0 },
	{ 3, "0 M", (int64_t)150L, HN_DIVISOR_1000, HN_NOSPACE },
	{ 3, "0 M", (int64_t)500L, HN_DIVISOR_1000, HN_NOSPACE },
	{ 3, "0 M", (int64_t)999L, HN_DIVISOR_1000, HN_NOSPACE },
	{ 4, "150", (int64_t)150L, HN_DIVISOR_1000, 0 },
	{ 4, "500", (int64_t)500L, HN_DIVISOR_1000, 0 },
	{ 4, "999", (int64_t)999L, HN_DIVISOR_1000, 0 },
	{ 5, "100", (int64_t)1000L, HN_DIVISOR_1000, 0 },
	{ 5, "150", (int64_t)1500L, HN_DIVISOR_1000, 0 },
	{ 7, "500", (int64_t)500*1000L, HN_DIVISOR_1000, 0 },
	{ 8, "150", (int64_t)1500*1000L, HN_DIVISOR_1000, 0 },
	{ 10, "500", (int64_t)500*1000*1000L, HN_DIVISOR_1000, 0 },
	{ 11, "150", (int64_t)1500*1000*1000L, HN_DIVISOR_1000, 0 },

	/* tests 115-126 test scale 0 with 1024 divisor - print first N digits */
	{ 2, "0 ", (int64_t)0L, 0, 0 },
	{ 2, "1 ", (int64_t)1L, 0, 0 },
	{ 3, "10 ", (int64_t)10L, 0, 0 },
	{ 4, "150", (int64_t)150L, 0, 0 },
	{ 4, "500", (int64_t)500L, 0, 0 },
	{ 4, "999", (int64_t)999L, 0, 0 },
	{ 5, "100", (int64_t)1000L, 0, 0 },
	{ 5, "150", (int64_t)1500L, 0, 0 },
	{ 7, "500", (int64_t)500*1000L, 0, 0 },
	{ 8, "150", (int64_t)1500*1000L, 0, 0 },
	{ 10, "500", (int64_t)500*1000*1000L, 0, 0 },
	{ 11, "150", (int64_t)1500*1000*1000L, 0, 0 },

	/* Test boundary cases for very large positive/negative number formatting */
	/* Explicit scale, divisor 1024 */

	/* XXX = requires length 5 (buflen 6) for some cases*/
	/* KLUDGE - test loop below will bump length 5 up to 5 */
	{ 3, "8 E",   INT64_MAX, 0, 6 },
	{ 4, "-8 E", -INT64_MAX, 0, 6 },
	{ 3, "0 E", (int64_t)92*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 E", -(int64_t)92*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 E", (int64_t)82*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 E", -(int64_t)82*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 E", (int64_t)81*1024*1024*1024*1024*1024L, 0, 6 },
	{ 3, "0 E", -(int64_t)81*1024*1024*1024*1024*1024L, 0, 6 },
	{ 4, "92 P", (int64_t)92*1024*1024*1024*1024*1024L, 0, 5 },
	{ 5, "-92 P", -(int64_t)92*1024*1024*1024*1024*1024L, 0, 5 },
	{ 4, "82 P", (int64_t)82*1024*1024*1024*1024*1024L, 0, 5 },
	{ 5, "-82 P", -(int64_t)82*1024*1024*1024*1024*1024L, 0, 5 },
	{ 4, "81 P", (int64_t)81*1024*1024*1024*1024*1024L, 0, 5 },
	{ 5, "-81 P", -(int64_t)81*1024*1024*1024*1024*1024L, 0, 5 },

	/* Explicit scale, divisor 1000 */
	{ 3, "9 E",   INT64_MAX, HN_DIVISOR_1000, 6 },
	{ 4, "-9 E", -INT64_MAX, HN_DIVISOR_1000,  6 },
	{ 3, "0 E", (int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  6 },
	{ 3, "0 E", -(int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  6 },
	{ 3, "0 E", (int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  6 },
	{ 3, "0 E", -(int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  6 },
	{ 4, "92 P", (int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  5 },
	{ 5, "-92 P", -(int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  5 },
	{ 4, "91 P", (int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  5 },
	{ 5, "-91 P", -(int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  5 },

	/* Autoscale, divisor 1024 */
	{ 3, "8 E",   INT64_MAX, 0, HN_AUTOSCALE },
	{ 4, "-8 E", -INT64_MAX, 0, HN_AUTOSCALE },
	{ 4, "92 P", (int64_t)92*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 5, "-92 P", -(int64_t)92*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 4, "82 P", (int64_t)82*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 5, "-82 P", -(int64_t)82*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 4, "81 P", (int64_t)81*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	{ 5, "-81 P", -(int64_t)81*1024*1024*1024*1024*1024L, 0, HN_AUTOSCALE },
	/* Autoscale, divisor 1000 */
	{ 3, "9 E",   INT64_MAX, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 4, "-9 E", -INT64_MAX, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 4, "92 P", (int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "-92 P", -(int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 4, "91 P", (int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "-91 P", -(int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000, HN_AUTOSCALE },

	/* 0 scale, divisor 1024 */
	{ 12, "skdj",  INT64_MAX, 0, 0 },
	{ 21, "-9223", -INT64_MAX, 0, 0 },
	{ 19, "10358", (int64_t)92*1024*1024*1024*1024*1024L, 0, 0 },
	{ 20, "-1035", -(int64_t)92*1024*1024*1024*1024*1024L, 0, 0 },
	{ 18, "92323", (int64_t)82*1024*1024*1024*1024*1024L, 0, 0 },
	{ 19, "-9232", -(int64_t)82*1024*1024*1024*1024*1024L, 0, 0 },
	{ 18, "91197", (int64_t)81*1024*1024*1024*1024*1024L, 0, 0 },
	{ 19, "-9119", -(int64_t)81*1024*1024*1024*1024*1024L, 0, 0 },

	/* 0 scale, divisor 1000 */
	/* XXX - why does this fail? */
	{ -1, "", INT64_MAX, HN_DIVISOR_1000, 0 },
	{ 21, "-9223", -INT64_MAX, HN_DIVISOR_1000,  0 },
	{ 19, "10358", (int64_t)92*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },
	{ 20, "-1035", -(int64_t)92*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },
	{ 18, "92323", (int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },
	{ 19, "-9232", -(int64_t)82*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },
	/* Expected to pass */
	{ 18, "91197", (int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },
	{ 19, "-9119", -(int64_t)81*1024*1024*1024*1024*1024L, HN_DIVISOR_1000,  0 },



	/* Need to implement tests for GETSCALE */
/*	{ ?, "", (int64_t)0L, HN_DIVISOR_1000, HN_GETSCALE },
	...
*/
        /* Tests for HN_DECIMAL */
        /* Positive, Autoscale */
	{ 5, "500 k", (int64_t)500*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "994 k", (int64_t)994*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "995 k", (int64_t)995*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "999 k", (int64_t)999*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "1.0 M", (int64_t)1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "1.5 M", (int64_t)1500*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "1.9 M", (int64_t)1949*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "2.0 M", (int64_t)1950*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "9.9 M", (int64_t)9949*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 4, "10 M", (int64_t)9950*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "500 M", (int64_t)500*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "994 M", (int64_t)994*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "995 M", (int64_t)995*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "999 M", (int64_t)999*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },

	{ 5, "500 K", (int64_t)500*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "994 K", (int64_t)994*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "995 K", (int64_t)995*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "999 K", (int64_t)999*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.0 M", (int64_t)1000*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.0 M", (int64_t)1018*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.0 M", (int64_t)1019*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.5 M", (int64_t)1536*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.9 M", (int64_t)1996*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "2.0 M", (int64_t)1997*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "2.0 M", (int64_t)2047*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "2.0 M", (int64_t)2048*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "2.0 M", (int64_t)2099*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "2.1 M", (int64_t)2100*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "9.9 M", (int64_t)10188*1024L, HN_DECIMAL, HN_AUTOSCALE },
	/* XXX - shouldn't the following two be "10. M"? */
	{ 4, "10 M", (int64_t)10189*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 4, "10 M", (int64_t)10240*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "500 M", (int64_t)500*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "994 M", (int64_t)994*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "995 M", (int64_t)995*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "999 M", (int64_t)999*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.0 G", (int64_t)1000*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "1.0 G", (int64_t)1023*1024*1024L, HN_DECIMAL, HN_AUTOSCALE },

        /* Negative, Autoscale - should pass */
	{ 6, "-1.5 ", -(int64_t)1500*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 6, "-1.9 ", -(int64_t)1949*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 6, "-9.9 ", -(int64_t)9949*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },

	{ 6, "-1.5 ", -(int64_t)1536*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 6, "-1.9 ", -(int64_t)1949*1024L, HN_DECIMAL, HN_AUTOSCALE },
	{ 6, "-9.7 ", -(int64_t)9949*1024L, HN_DECIMAL, HN_AUTOSCALE },

	/* Positive/negative, at maximum scale */
	{ 5, "500 P", (int64_t)500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "1.9 E", (int64_t)1949*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "8.9 E", (int64_t)8949*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 5, "9.2 E", INT64_MAX, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
        /* Negatives work with latest rev only: */
	{ 6, "-9.2 ", -INT64_MAX, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },
	{ 6, "-8.9 ", -(int64_t)8949*1000*1000*1000*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, HN_AUTOSCALE },

	{ 5, "8.0 E",   INT64_MAX, HN_DECIMAL, HN_AUTOSCALE },
	{ 5, "7.9 E",   INT64_MAX-(int64_t)100*1024*1024*1024*1024*1024LL, HN_DECIMAL, HN_AUTOSCALE },
	{ 6, "-8.0 ", -INT64_MAX, HN_DECIMAL, HN_AUTOSCALE },
	{ 6, "-7.9 ",   -INT64_MAX+(int64_t)100*1024*1024*1024*1024*1024LL, HN_DECIMAL, HN_AUTOSCALE },

	/* Positive, Fixed scales */
	{ 5, "500 k", (int64_t)500*1000L, HN_DECIMAL|HN_DIVISOR_1000, 1 },
	{ 5, "0.5 M", (int64_t)500*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "949 k", (int64_t)949*1000L, HN_DECIMAL|HN_DIVISOR_1000, 1 },
	{ 5, "0.9 M", (int64_t)949*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "950 k", (int64_t)950*1000L, HN_DECIMAL|HN_DIVISOR_1000, 1 },
	{ 5, "1.0 M", (int64_t)950*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "999 k", (int64_t)999*1000L, HN_DECIMAL|HN_DIVISOR_1000, 1 },
	{ 5, "1.0 M", (int64_t)999*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "1.5 M", (int64_t)1500*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "1.9 M", (int64_t)1949*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "2.0 M", (int64_t)1950*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "9.9 M", (int64_t)9949*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 4, "10 M", (int64_t)9950*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "500 M", (int64_t)500*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "0.5 G", (int64_t)500*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, 3 },
	{ 5, "999 M", (int64_t)999*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, 2 },
	{ 5, "1.0 G", (int64_t)999*1000*1000L, HN_DECIMAL|HN_DIVISOR_1000, 3 },
	/* Positive/negative, at maximum scale */
	{ 5, "500 P", (int64_t)500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 5 },
	{ 5, "1.0 E", (int64_t)500*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 5, "1.9 E", (int64_t)1949*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 5, "8.9 E", (int64_t)8949*1000*1000*1000*1000*1000L, HN_DIVISOR_1000, 6 },
	{ 5, "9.2 E", INT64_MAX, HN_DECIMAL|HN_DIVISOR_1000, 6 },

	/* HN_DECIMAL + binary + fixed scale cases not completed */
	{ 5, "512 K", (int64_t)512*1024L, HN_DECIMAL, 1 },
	{ 5, "0.5 M", (int64_t)512*1024L, HN_DECIMAL, 2 },

	/* Negative, Fixed scales */
        /* Not yet added, but should work with latest rev */

};


/* Command line options usage */
static void
usage(char * progname) {
	printf("%s: tests libutil humanize_number function\n", progname);
	printf("Usage: %s [-nE] [-l num] [-v]\n\n", progname);
	printf("Options:\n");
	printf("\t-l num\tSet max length for result; buflen = num + 1\n");
	printf("\t\t  (NOTE: does not change expected result strings.)\n");
	printf("\t-n\tInclude negative scale tests, which cause older libutil\n");
	printf("\t\t  version of function to coredump with assertion failure\n");
	printf("\t-E\tInclude numbers > 1/2 Exa[byte] which currently fail\n");
	printf("\t-v\tVerbose - always print summary results\n");
	printf("\t-h, -?\tShow options\n");
}

/* Parse command line options */
static void
read_options(int argc, char * const argv[], size_t *bufLength,
    int *includeNegativeScale, int *includeExabytes, int *verbose) {
	int ch;
	size_t temp;

	while ((ch = getopt(argc, argv, "nEh?vl:")) != -1) {
		switch (ch) {
			default:
				usage(argv[0]);
				exit(1);
				break;	/* UNREACHABLE */
			case 'h' :
			case '?' :
				usage(argv[0]);
				exit(0);
				break;	/* UNREACHABLE */
			case 'l' :
				sscanf(optarg, "%zu", &temp);
				*bufLength = temp + 1;
				break;
			case 'n' :
				*includeNegativeScale = 1;
				break;
			case 'E' :
				*includeExabytes = 1;
				break;
			case 'v' :
				*verbose = 1;
				break;
		}
	}
}

static struct {
	int value;
	const char *name;
 } flags[] = {
	{ HN_AUTOSCALE, "HN_AUTOSCALE" },
	{ HN_GETSCALE, "HN_GETSCALE" },
	{ HN_DIVISOR_1000, "HN_DIVISOR_1000"},
	{ HN_B, "HN_B"},
	{ HN_DECIMAL, "HN_DECIMAL"},
};

static const char *separator = "|";

/* Format flags parameter for meaningful display */
static char *
str_flags(int hn_flags, char *noFlags) {
	size_t i;
	char * result;

	result = malloc(MAX_STR_FLAGS_RESULT);
	result[0] = '\0';

	for (i = 0; i < sizeof flags / sizeof *flags; i++) {
		if (hn_flags & flags[i].value) {
			if (*result != 0)
				strlcat(result, separator,
				    MAX_STR_FLAGS_RESULT);
			strlcat(result, flags[i].name, MAX_STR_FLAGS_RESULT);
		}
	}

	if (strlen(result) == 0)
		strlcat(result, noFlags, MAX_STR_FLAGS_RESULT);
	return result;
}


/* Format scale parameter for meaningful display */
static char *
str_scale(int scale) {
	char *result;

	if (scale == HN_AUTOSCALE || scale == HN_GETSCALE)
		return str_flags(scale, "");

	result = malloc(MAX_INT_STR_DIGITS);
	result[0] = '\0';
	snprintf(result, MAX_INT_STR_DIGITS, "%d", scale);
	return result;
}

static void
testskipped(size_t i)
{

	printf("ok %zu # skip - not turned on\n", i);
}

int
main(int argc, char * const argv[])
{
	char *buf;
	char *flag_str, *scale_str;
	size_t buflen, errcnt, i, skipped, tested;
	int r;
	int includeNegScale;
	int includeExabyteTests;
	int verbose;

	buflen = 4;
	includeNegScale = 0;
	includeExabyteTests = 0;
	verbose = 0;

	read_options(argc, argv, &buflen, &includeNegScale,
	    &includeExabyteTests, &verbose);

	buf = malloc(buflen);
	errcnt = 0;
	tested = 0;
	skipped = 0;

	if (buflen != 4)
		printf("Warning: buffer size %zu != 4, expect some results to differ.\n", buflen);

	printf("1..%zu\n", nitems(test_args));
	for (i = 0; i < nitems(test_args); i++) {
		/* KLUDGE */
		if (test_args[i].num == INT64_MAX && buflen == 4) {
		        /* Start final tests which require buffer of 6 */
		        free(buf);
		        buflen = 6;
                        buf = malloc(buflen);
                        if (verbose)
                                printf("Buffer length increased to %zu\n",
				    buflen);
		}

		if (test_args[i].scale < 0 && ! includeNegScale) {
			skipped++;
			testskipped(i + 1);
			continue;
		}
		if (test_args[i].num >= halfExabyte && ! includeExabyteTests) {
			skipped++;
			testskipped(i + 1);
			continue;
		}

		r = humanize_number(buf, buflen, test_args[i].num, "",
		    test_args[i].scale, test_args[i].flags);
		flag_str = str_flags(test_args[i].flags, "[no flags]");
		scale_str = str_scale(test_args[i].scale);

		if (r != test_args[i].retval) {
			if (verbose)
				printf("wrong return value on index %zu, "
				    "buflen: %zu, got: %d + \"%s\", "
				    "expected %d + \"%s\"; num = %jd, "
				    "scale = %s, flags= %s.\n",
				    i, buflen, r, buf, test_args[i].retval,
				    test_args[i].res,
				    (intmax_t)test_args[i].num,
				    scale_str, flag_str);
			else
				printf("not ok %zu # return %d != %d\n",
				    i + 1, r, test_args[i].retval);
			errcnt++;
		} else if (strcmp(buf, test_args[i].res) != 0) {
			if (verbose)
				printf("result mismatch on index %zu, got: "
				    "\"%s\", expected \"%s\"; num = %jd, "
				    "scale = %s, flags= %s.\n",
				    i, buf, test_args[i].res,
				    (intmax_t)test_args[i].num,
				    scale_str, flag_str);
			else
				printf("not ok %zu # buf \"%s\" != \"%s\"\n",
				    i + 1, buf, test_args[i].res);
			errcnt++;
		} else {
			if (verbose)
				printf("successful result on index %zu, "
				    "returned %d, got: \"%s\"; num = %jd, "
				    "scale = %s, flags= %s.\n",
				    i, r, buf,
				    (intmax_t)test_args[i].num,
				    scale_str, flag_str);
			else
				printf("ok %zu\n", i + 1);
		}
		tested++;
	}

	if (verbose)
		printf("total errors: %zu/%zu tests, %zu skipped\n", errcnt,
		    tested, skipped);

	if (errcnt)
		return 1;

	return 0;
}